When combining federal and state income tax rates, the U.S. top rate was far from the highest relative to other OECD countries in 2012. And it kicked in at a much higher level of income than most.

Sources: James Nunns, Tax Policy Center; OECDInteractive: Tal Yellin / CNNMoneyFootnotes: The top state or sub-central rate may apply at somewhat higher income levels than shown. Countries with an * impose a flat tax. Tax rates rounded.